Method and apparatus for mapping TDM payload data

Abstract

A method and apparatus includes a DS3 framer ( 122 ) receiving a DS3 signal ( 150 ) having TDM payload data ( 152 ) at a line interface node ( 102, 104 ). A logic unit ( 124 ) at the line interface node maps the DS3 signal to a packet-based Cframe ( 156 ) at the line interface node, wherein the packet-based Cframe includes the TDM payload data ( 152 ). The packet-based Cframe having the TDM payload data is distributed over a packet switched backplane ( 110 ) using a Common Switch Interface ( 115 ) to one or more of a plurality of payload nodes ( 106, 108, 112 ).

1 . A method, comprising: 
 receiving a DS3 signal having TDM payload data at a line interface node;    mapping the DS3 signal to a packet-based Cframe at the line interface node, wherein the packet-based Cframe includes the TDM payload data; and    distributing the packet-based Cframe having the TDM payload data over a packet switched backplane using a Common Switch Interface to one or more of a plurality of payload nodes.    
     
     
         2 . The method of  claim 1 , wherein the packet-based Cframe is less than 64 bytes.  
     
     
         3 . The method of  claim 1 , wherein the packet-based Cframe is 48 bytes.  
     
     
         4 . The method of  claim 1 , wherein the packet-based Cframe comprises a TDM payload data portion.  
     
     
         5 . The method of  claim 1 , wherein the packet-based Cframe comprises a context ID portion.  
     
     
         6 . The method of  claim 5 , wherein the context ID portion comprises at least one of a DS3 ID portion, a DS1 ID portion, a payload ID portion and a frame ID portion.  
     
     
         7 . The method of  claim 1 , further comprising: 
 receiving the DS3 signal at a first line interface node and at a second line interface node;    the first line interface node and the second line interface node distributing the packet-based Cframe having the TDM payload data to one or more of the plurality of payload nodes; and    one or more of the plurality of payload nodes determining from which of the first line interface node and the second line interface node to accept the packet-based Cframe having the TDM payload data.    
     
     
         8 . The method of  claim 1 , further comprising: 
 receiving the DS3 signal at a first line interface node and at a second line interface node;    the first line interface node and the second line interface node polling each other;    determining which of the first line interface node and the second line interface node is in an active mode; and    one of the first line interface node and the second line interface node that is in the active mode distributing the packet-based Cframe having the TDM payload data to one or more of the plurality of payload nodes.    
     
     
         9 . A line interface node, comprising: 
 a DS3 framer, wherein the DS3 framer receives a DS3 signal having TDM payload data; and    a logic unit, wherein the logic unit maps the DS3 signal to a packet-based Cframe having the TDM payload data, wherein the logic unit distributes the packet-based Cframe having the TDM payload data over a packet switched backplane using a Common Switch Interface to one or more of a plurality of payload nodes.    
     
     
         10 . The line interface node of  claim 9 , wherein the packet-based Cframe is less than 64 bytes.  
     
     
         11 . The line interface node of  claim 9 , wherein the packet-based Cframe is 48 bytes.  
     
     
         12 . The line interface node of  claim 9 , wherein the packet-based Cframe comprises a TDM payload data portion.  
     
     
         13 . The line interface node of  claim 9 , wherein the packet-based Cframe comprises a context ID portion.  
     
     
         14 . The line interface node of  claim 13 , wherein the context ID portion comprises at least one of a DS3 ID portion, a DS1 ID portion, a payload ID portion and a frame ID portion.  
     
     
         15 . A multi-service platform system, comprising: 
 a first line interface node coupled to receive a DS3 signal having TDM payload data, wherein the first line interface node maps the DS3 signal to a packet-based Cframe;    a second line interface node coupled to receive the DS3 signal having the TDM payload data, wherein the second line interface node maps the DS3 signal to a packet-based Cframe; and    a plurality of payload nodes, wherein the first fine interface node and the second line interface node distribute the packet-based Cframe having the TDM payload data over a packet switched backplane using a Common Switch Interface to one or more of the plurality of payload nodes.    
     
     
         16 . The multi-service platform system of  claim 15 , one or more of the plurality of payload nodes determines from which of the first line interface node and the second line interface node to accept the packet-based Cframe having the TDM payload data.  
     
     
         17 . The multi-service platform system of  claim 15 , wherein the packet-based Cframe is less than 64 bytes.  
     
     
         18 . The multi-service platform system of  claim 15 , wherein the packet-based Cframe is 48 bytes.  
     
     
         19 . The multi-service platform system of  claim 15 , wherein the packet-based Cframe comprises a TDM payload data portion.  
     
     
         20 . The multi-service platform system of  claim 15 , wherein the packet-based Cframe comprises a context ID portion.  
     
     
         21 . The multi-service platform system of  claim 20 , wherein the context ID portion comprises at least one of a DS3 ID portion, a DS1 ID portion, a payload ID portion and a frame ID portion.  
     
     
         22 . A line interface node comprising a computer-readable medium containing computer instructions for instructing a processor to perform a method of mapping and distributing a DS3 signal having a TDM payload, the instructions comprising: 
 receiving the DS3 signal having the TDM payload data at the line interface node;    mapping the DS3 signal to a packet-based Cframe at the line interface node, wherein the packet-based Cframe includes the TDM payload data; and    distributing the packet-based Cframe having the TDM payload data over a packet switched backplane using a Common Switch Interface to one or more of a plurality of payload nodes.    
     
     
         23 . The line interface node of  claim 22 , wherein the packet-based Cframe is less than 64 bytes.  
     
     
         24 . The line interface node of  claim 22 , wherein the packet-based Cframe is 48 bytes.  
     
     
         25 . The line interface node of  claim 22 , wherein the packet-based Cframe comprises a TDM payload data portion.  
     
     
         26 . The line interface node of  claim 22 , wherein the packet-based Cframe comprises a context ID portion.  
     
     
         27 . The line interface node of  claim 26 , wherein the context ID portion comprises at least one of a DS3 ID portion, a DS1 ID portion, a payload ID portion and a frame ID portion.  
     
     
         28 . The line interface node of  claim 22 , further comprising: 
 receiving the DS3 signal at a first line interface node and at a second line interface node;    the first line interface node and the second line interface node distributing the packet-based Cframe having the TDM payload data to one or more of the plurality of payload nodes; and    one or more of the plurality of payload nodes determining from which of the first line interface node and the second line interface node to accept the packet-based Cframe having the TDM payload data.    
     
     
         29 . The line interface node of  claim 22 , further comprising: 
 receiving the DS3 signal at a first line interface node and at a second line interface node;    the first line interface node and the second line interface node polling each other;    determining which of the first line interface node and the second line interface node is in an active mode; and    one of the first line interface node and the second line interface node that is in the active mode distributing the packet-based Cframe having the TDM payload data to one or more of the plurality of payload nodes.